18872777057 has 2 divisors, whose sum is σ = 18872777058. Its totient is φ = 18872777056.

The previous prime is 18872777003. The next prime is 18872777087. The reversal of 18872777057 is 75077727881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11085773521 + 7787003536 = 105289^2 + 88244^2 .

It is a cyclic number.

It is not a de Polignac number, because 18872777057 - 2¹⁶ = 18872711521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18872776987 and 18872777005.

It is not a weakly prime, because it can be changed into another prime (18872777087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9436388528 + 9436388529.

It is an arithmetic number, because the mean of its divisors is an integer number (9436388529).

Almost surely, 2^18872777057 is an apocalyptic number.

It is an amenable number.

18872777057 is a deficient number, since it is larger than the sum of its proper divisors (1).

18872777057 is an equidigital number, since it uses as much as digits as its factorization.

18872777057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10756480, while the sum is 59.

The spelling of 18872777057 in words is "eighteen billion, eight hundred seventy-two million, seven hundred seventy-seven thousand, fifty-seven".